CAN, Le Xuan. On quasiperiodic oscillations of a nonlinear dynamic system of Liapunov type with time lag. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 20, n. 1, p. 1–8, 1998. DOI: 10.15625/0866-7136/10007. Disponível em: https://vjmech.vast.vn/vjmech/article/view/10007. Acesso em: 8 nov. 2025.